That’s nice, except hundreds of thousands of Talmidim and followers of the Psak Din of Rav Elyashev shlita and others will consider those children to be mamzeirim. Its hard to imagine that child finding a shidduch, even among those who don’t consider him a mamzer, when a large portion of Klal Yisroel will consider him or her a mamzer.
And which man would be crazy enough to marry such a woman in the first place, considering their children will be considered mamzeirim by many, even if he doesn’t hold like that?